package com.kfm.web;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/logout")
public class LogoutServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        resp.setCharacterEncoding("UTF-8");
         // 获取session
        HttpSession session = req.getSession();
        Object loginUser = session.getAttribute("loginUser");
        if (loginUser == null) {
            resp.getWriter().write("<h3>请先登录</h3>");
            return;
        }
        session.removeAttribute("loginUser");
        session.invalidate();
        resp.sendRedirect("/index.html");
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doPost(req, resp);
    }
}
